Angular project send URL parameters to mongodb

I have been stuck for almost a week. Want to fetch URL parameters and send it to backend(Mongodb). Please help me. Every suggestions will be appreciated.

I am able to get URL params into HTML but want to show it in MongoDatabase. Sharing my code below

Contact.component.ts

import { Component, OnInit, NgModule, SimpleChanges, OnChanges, DoCheck, Input } from '@angular/core';
import { Feedback } from '../model/feedback';
import { AuthGuardService } from '../guards/auth-guard.service';
import { ActivatedRoute } from '@angular/router';
import { ApiService } from '../api.service';


@Component({
  selector: 'app-contact',
  templateUrl: './contact.component.html',
  styleUrls: ['./contact.component.scss', './contact.component.mobile.scss']
})
export class ContactComponent implements OnInit {
  //name of parameters to fetch
  // @Input() authors: AuthorModel;
  bannerid: string;
  devicetype: string;
  country: string;

  constructor(private authGuardService: AuthGuardService,
    private route: ActivatedRoute,
    private apiService: ApiService) { }


  ngOnInit(): void {
    this.route.queryParams.subscribe(queryParam => {
      this.bannerid = queryParam.bannerid;
      this.devicetype = queryParam.devicetype;
      this.country = queryParam.country;
      console.log(queryParam);
    })
  }

  ngOnChanges(changes: SimpleChanges): void {
    console.log(changes);
  }

  feedModel = new Feedback('', '', '', '', '', '', '');


  onSubmit(data): void {
    // console.log(data);
    //  console.log(this.feedModel);
    this.apiService.onSubmit(data);
    this.authGuardService.feedBack(this.feedModel);
  }
  // queryParam(latest): void{
  //   console.log(latest);
  //   this.apiService.queryParam(this.bannerid);
  // }


}